package com.solace.disruptor.solace;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

class Count{
    private int count = 0;
    private Random rand=new Random(20);
    public synchronized int increment(){
        int temp=count;
        if (rand.nextBoolean())
            Thread.yield();
        return (count=++temp);
    }
    public synchronized int value(){
        return count;
    }
}

class Entrance implements Runnable{
    private static Count count = new Count();
    private static List<Entrance> entrances=new ArrayList<Entrance>();
    private int number=0;
    private final int id;
    private static volatile boolean canceled=false;
    public static void cancel(){
        canceled=true;
    }
    public Entrance(int id) {
        this.id=id;
        entrances.add(this);
    }
    @Override
    public void run() {
        while (!canceled){
            synchronized (this){
                ++number;
            }
            System.out.println(this+" total: "+count.increment());
            try {
                TimeUnit.MILLISECONDS.sleep(100);
            }catch (InterruptedException e){
                System.out.println("sleep interrupted");
            }
        }
        System.out.println("Stoping "+ this);
    }
    public synchronized int getValue(){
        return number;
    }
    public String toString(){
        return "Entrance id:"+id+" number:"+getValue();
    }
    public static int getTotalCount(){
        return count.value();
    }
    public static int sumEntrance(){
        int sum = 0;
        for (Entrance entrance:entrances)
            sum+=entrance.getValue();
        return sum;
    }
}

public class FuSheCount {
    public static void main(String[] args) throws InterruptedException {
        ExecutorService exec= Executors.newCachedThreadPool();
        for (int i=0;i<5;i++)
            exec.execute(new Entrance(i));
        TimeUnit.SECONDS.sleep(3);
        Entrance.cancel();
        exec.shutdown();
        if(!exec.awaitTermination(250,TimeUnit.MILLISECONDS))
            System.out.println("some tasls were not terminated");
        System.out.println("Total: "+Entrance.getTotalCount());
        System.out.println("Sum of Entrances: "+Entrance.sumEntrance());
    }
}